Road grader and scarifier



July l1, 1933. F, E. ARNDT ROAD GRADER AND SCARIFIER Filed NOV. l5, 1928 4 Sheets-Sheet l nin,

July l1, 1933. F. E. ARNDT ROAD GRADER AND SCARIFIER Filed Nov. 15. 1928 4 Sheets-Sheet 2 gwvwskoz rlqrndf wlw July ll, 1933. F. E. ARNDT ROAD GRADER AND SCARIFIER Filed Nov. 15, 1928 4 Sheets-Sheet 3 a gg F. E. ARNDT ROAD GRADER AND SCARIFIER 4 Sheets-Sheet 4 Patented .July l1, 1933 ATENT OFFICE FELANKLH E. ARNDT, F GALON, OHIO, ASSIGNOR TO THE GALION IRON WORKS & fNUACT-QG CMPEY, OF GL'JON, OHIO, CORPORATION 0F OHIO ROAD GRADER AND SCARIFIER This invention reiates to rougi working machines and particularly to road graders pio vided or Combined with scariiiers.

One oi? the objects of the present invenvl" tion is io provide a coi'ubined road grader and scariiier in which the scaritier is carried by and supported from the draw bars which carry the scraping blade so that the Whole weigl'rt oi the draw bars, the circle and the yoke supporting the :scraping biade may be utilized in forcing the scarifyjng teeth into the roadway.k f

A further object is to provide a structure of this character so constructed that the scarier can be raised or lor-:ered independently of the blade of the scraper and .in this connection to so coi'is'truet the machine that the scarifying may lbe done without scraping, scraping may be accomjjihshed without scarifying orl both scarifying and scraping may be accomplished at the same time.

Still another object is to so mount the scariier upon the draw bars of the blade that by operating the means for tilting the draw bars and the blade transversely that .the scariiier may be tilted so that the scarlher can be forced to out deeper on one side than the other by raising the blade supporting means at the right hand or at the left as y desired.

Other objects have to do with the details or" construction or the scariier and the means whereby the scaritier is raised or lowered and otherwise manipulated.

`My invention is illustrated iu the accompanying drawings, wherein:-

Figure 1 is a side elevation of a combined scariier and grader constructed in accordance with my invention;

Figure 2 is a fragmentary longitudinal sectional View thereof; Y

Figure 3 is an elevation of. the operating means for the scariier; l

Figure et is an eievation of a portion of the main frame showing the scariiier shaft supporting bracket in elevation;

Figure 5 is a top plan View of the scarifier, the .pivot pin for the same being in section;

Ffgure 6 vis van enlarged sectional View Application led November 15, 1928. Serial No. 319,632.

through the bearing for oscillatably supporting the searifier;

Figure 7 is a, section on the line 7 7 of Figure 6.

Figure 8 is a fragmentary top plan view of the middle portion of my grader.

In these drawings,- I have illustrated a grader of more or less well-known construe4 tion vwhich includes the,.longitudinally extending frame beams 10, these beams heilig longitudinally arched so yto extend downward and forward at their vfront ends.

The forward ends of these beams are operatively supported upon the forward axle of a truck in a manner not necessary to describe and connected-to draft mechanism not necessary to specifically-refer to. The rear ends of these beams 10 are mounted upon a rear truck or asile in any ordinary manner. Inasmuch as these details will form no part of the presen-t invention,` it is not deemed necessary to more thanrefer to them.

Loosely connected to the -forward truck, as for instance tothe transverse beams 1v1 thereof, are thetwo divergent rearwardly extending draw bars 12;v The forward ends of the draw bars are more-or `less exibly connected tothe beams 11 byzmeans of a clevis 13, the clevis being connected to an eye bolt 14 so that the levi-s may swing verti cally upon the eye bolt or swing horizontally upon the eye bolt. The draw bars '12 connect to this clevis ina manner permitting the oscillation of the draw bars around the longitudinal axis' of the cl'evis. This is n0 part of my present invention'as it is a conimon construction in graders ot the character stated.

Mounted for rotation upon the draw bars 12 is a yoke beam 15 semi-circular at its forward end, the two arms of the yoke extending rearward and downward and carrying I the scraper blade 16, the scraper blade being pivoted to the arms las at 17. The semi-circular portion of the member 15 is supported upon the draw bars 12 for oscillation in a horizontal plane, or in the plane of the draw bars by means of a pivot bolt 18 passing through a transverse channel iron 19 con necting the draw bars and passing through' a transverse channel iron 2O which extends between the arms of the yoke 15, as shown in Figure 2.

The yoke is apertured at a plurality of points and a retractible bolt 2l coacting with said apertures is operatively supported upon the draw bars so that the yoke may be held in any rotatably adjusted position, This bolt *l1 is operatively connected to the lever 22, in turn connected to a pull rod 2 whereby the bolt may be retracted, the bolt being preferably projected by means of a spring not shown. This also forms no part of my present invention. It will be seen that with this construction, the yoke which supports the scraping blade may be rotated around the axis of the bolt 18 to any desired position to thus angle the scraper blade with relation to the line of draft. The oscillative adjustment Iof the yoke and scraper blade is secured in the instance disclosed by means of an arcuate rack 24 operatively mounted upon the yoke and engaged by a pinion 25, the shaft of which carries the beveled gear 26 havingr meshing engagement with a beveled gear wheel lnounted upon a shaft section 27. This shaft section extends rearward and is flexibly enga-ged witha shaft section 28 which extends to the opcrators platform where it carries an operating Wheel. By this means the yoke 15 with the scraper blade may be rotated into any desiredl angular vrelation to the line of draft and the scraper blad-e then locked in position by means of the bolt 21 engaging the semicfircular por-tion of the yoke 15.

For the purpose of raising or lowering the draft beams 12, l have illustrated vertical links 29. These are operatively connected at their lower ends to a transverse beam 30 mounted lupon the draw bars and at their upper ends the links 29 Khave engagement each with a-fcrank arm 31 carried by the shaft 32 extending rearward to the operators platform and there operatively connected to operating means whereby one or the other of the shafts may be rotated.

If both of the shafts are rotated in the same direction, it is obvious that the draw bea-ms will be raised or lowered. If one of the operating ymeans be turned in one direction and the other in another, is obvious that `one side of the scraping blade wi-ll be lowered and the other side of the scraping blade raised, or in other words that the draw bars will be tilted, thus tilting the yoke 1.5 and `the scraper blade. Any suitable means may be used for accomplishing ythis result, the mechanism which I have illustrated being merely one of the conventional :means for this purpose.

My `present invention contemplates mounting -a scarifier element for vert-ical movement in front of the scraping blade and entirely supported by the draw bars, this mounting 21 being such that to afcertain extent,lthe adjustment of the scaritier shall be independent of the adjustment of the blade and the scaritier may be operated independently of the blade. To this end l mount upon the draft beams 12, the brackets 3? which brackets support the transverse shaft 34 upon which are mounted the segment gears 35. 'there are two of these segment gears 35 disposed on each side of the yoke 15. Mounted in the upper portion of the bracket 33 istlie transverse shaft 36 which carries upon its ends the pinions 37 engaging with the segment gears 35. The shaft 86 carries upon it a worm wheel 38 and engaging this worm wheel is the worm 89, the shaft of which has liexible engagement with a shaft section 4() extending rearward and flexibly engaged with the shaft section 41 which extends upward and rearward and is flexibly coupled to a shaft section carrying thereon the bevel gear 43.

This bevel gear is engaged by a beveled gear wheel 44 on a manually operable shaft 45 carrying the operating lever 46 at its upper end. By rotating the shalt 45 in one direction or the other, it obvious that the shaft 86 will be rotated .in one direction or the other and thus casse the up vard movement of the segmrnt gers 3.5' or the downward movement thereof. These segment gears have outvardly projecting vrist pins 47 engaged with the depending links 48.

rlhe scarifying element 49 is formed with outwardly projecting pairs of lugs BObetween which the links 48 are disposed and to which the links are pivotally connected by means of the pivot .pins 51. This scarifying element or frame consists of a transversely eX- tending casting formed to provide a plurality of downwardly and forwardly slanting open ended sockets 52 within which the scarifying teeth 53 are disposed. These :teeth are preferably pointed at opposite ends and the rear edge of each tooth is formed with a plurality of notches 54 through which passes a locking pin 55 which intersects 'the socket and intersects one or another of these notches. Thus the scarifying tooth may be held -in a plurality of different adjusted ,positions so that as it wears ott the tooth may be lowered and when entirely worn on one end the tooth may be turned over and the other end used until worn out.

The rear of the scarifying element 49 is provided with two pairs of upwardly and rearwardly projecting ears 56 which are relatively long, each pair of ears being spaced from each other vto receive between them a scarifying push bar 5'?. There are two of these push bars. These push bars are convex-gently arranged and at the rear end are apertured for the passage of a pin 58. These hars constitute thrust elements holding the `scarifier in predetermined position against the lthrust exerted bythe ground or roadway.

This pin extends through a circle connection comprising a collar or sleeve 59 through which :the bolt '18 passes, this collar being formed .withA a transversely extending horizontally disposedsleeve 60 through which the pin 58 passes. lThus it will be seen that the push bars 57 for the scarifier oscillate about the same axis as does-the blade supporting. the yoke while at the same time the push bars 57 may be vertically adjusted independently of any vertical adjustment of the yoke.

It will be seen that with the construct-ion which I l have heretofore described, the whole weight -of the main draw bars 12 and the weightof the scraper: and the scraper .sup-l porting yoke-bears downward upon the scarifier. This :secures rigidity when at work 'as the stresses are vvall carried up? through the blade unitfirst and then to the frame of the machine and this'eliminatesfpraotically all'vibrationland chattering. The scarifier when raised is'disposedv up under the circle, thus forming a' very compact unit when operating the blade independently of the scariier. T he mach'i'ne can be operated to do scarifier work and blade work at the same time or operated to do scarifier work independent of blade worker to do blade work independent of thes'carifier, thus forming a combination unit which is controlled while it will work by the lifting mechanism mounted upon the draft beams.

If it is desired to do scarifying without scraping, the segment gears 33 are turned to allow the scarifier to be lowered approximately to its limit, the blade being raised. The teeth of the scariier at this time will be in approximate contact with the ground.

T he blade control hand wheels which control the raising and lowering of the draw bars 12 are operated to allow the draw bars and blade to move downward which will force the scaritier into the ground but the draw bars are only let down sufficiently so that the blade will clear the scaried work. If the scarifying be deep the blade at some times Will touch some of the loose material but this will not in any way interfere with the proper operation of the scariier.

Inasmuch as means are provided whereby the draw bars may be transversely tilted so as to permit one side of the blade to cut deeper than the other, it is possible to so adjust the draw bars and thus the scarilier can be forced in deeper on one side than the other as for instance by raising one of the draw bars and lowering the other draw bar, thus tilting in eifect the frame upon which the scariier is mounted. This, of course, is due to the fact that the scarifier is entirely mounted on and tilts with the draw bars. If it is desired to do scarifying work and scraping at the same time, the draw bars are lowered to depress the blade the required amount and at the same time the scariier may be :'65 slightly raised so as to permit the blade to get' down into the-r loosened material. Of course if it be desired to dofscraping without scarifying, the scarifler is raised to its maximum height where itis carried along under the blade circle. VvBy this principle, 1 have provided an independently operated scarilier, which may be raised or lowered to suit conditions. y `f' i 'y l. A grading machine having a main frame, draw bars operatively connected to the main "frame for vertical movement, a scraper supporting yoke mounted upon the draw loars'for 'oscillation inv a v'horizont-al plane and carrying a. scraper', a scari-fier'fdis'- posed in front of the scraper, a `shaft mounted upon-the draw bars, segment gears on the sh att, a Worm wheel on t'hefshaft, a manually operable worm for' rotating thel shaft and engaging the worm`v` wheel,i links pivotally' connecting the scarifi'er tosai'd segment fgeai's, and scarifier push` barspivotally' engagedI with the scarifier-and extending upward and operatively pivote'd at a point adjacent the rotational axisof the yoke to the draw bars.

Y 2. A grading [machine having a main frame, draw bars connectedthereto attheirv forward ends for vertical movement, manually operable means for raising or lowering the draw bars independently of each other, a

scraper supporting yoke mounted upon the draw bars for movement therewith and for oscillation around la vertical axis, a scraper carried by the yoke, a scarifer disposed in front of the scraper, a shaft mounted on the draw bars and segment gears carried thereby and pivotally connected to the scarifier, a second shaft mounted upon the draw bars and having gear wheels engaging the segment gears, manually operable means for rotating the second shaft, and push bars pivoted to the scarifier extending upward and rearward therefrom, the rear ends of the scarifier push bars being operatively pivoted to the main draw bars at a point adjacent the center of rotation of said yoke.

3. In a grading machine, the combination with a main frame, of draw bars connected to said main frame, a scraper mounted on said draw bars and operatively connected thereto for horizontal pivotal movement relative thereto, a scariier carried by said draw bars in advance of the scraper, and thrust resisting members extending between the scarier and the pivotal connection of said scraper to the draw bars.

4. In a grading machine, the combination with a main frame, of draw bars operatively mounted on said frame for vertical and tilting movement, a scraper operatively carried by said draw bars for movement therewith, and pivotally mounted for independent horizontal angular movement, a scarifier operatively carried by said draw bars and disposed in advance of the scraper, and means conlll) necting said scarifier With said scraper pivot.

5. In a grading machine, the combination with a main frame, of draw bars mounted on said main frame for vertical and tilting movement, a yoke mounted upon said draw bars for rotational movement in a plane transverse to the draw bars, a scraper pivotally mounted on said yoke for movement therewith, a scarier disposed in advance of the scraper, push bars connecting said scaritier with the pivotal center of the yoke, and means mounted-upon the draw bars whereby the scariiier may be raised or lowered independently of the vertical movementI of the draw bars.

6. In a grading machine having a main frame, draw bars operatively connected to the main frame for free lateral movement and for vertical movement, means for independently raising or lowering either of said draw bars, a scraper supporting yoke mounted lupon the draw bars for oscillation in an approximately horizontal plane and carrying a scraper, va scarifier disposed in front of the scraper, ,a shaft mounted upon the draw bars, segment gears mounted on the shaft, manually operable means for rotating sald shaft, links pivotally connecting the scaritier directly' to the Segment gears, and means connected to the scarifier and pivotally engaged with the draw bars and resisting thrust against the scarier, the scraper being thus mounted for independent rotation relative to the scarilier.

7. In a grading machine, a main frame, draw bars mounted upon said main frame for lateral swinging movement and for vertical adjustment, means onthe main frame whereby the draw bars may be transversely tilted, a scarifier disposed below the draw bars, a shaft mounted directly on said draw bars, segment gears on said shaft, each having a linked connection .to the scarier, -manually operable means or'osci'llatingsaid segment gears to thereby raise or lower the scariier relative to the draw bars, push bars operatively connected to the scarifier and pivotally connected to the draw bars,and a scraper carried bythe draw bars rearward ot the scariier., the scraper being mounted f or rotational adjustment in an approximately horizontal plane independently of the scarifier.

ln testimony whereof I affix my signature.

FRANKLIN E. ARNDT. 

